A suspension device for a tower boiler water wall and a water wall structure
By adopting a combination structure of pre-welded components and tension plate assemblies in the water-cooled wall of the tower boiler, the problems of uneven load transfer and poor thermal expansion adaptability are solved, achieving uniform load transfer and coordinated thermal expansion, thereby improving the boiler's operational safety and ease of installation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUANENG LUOYUAN POWER GENERATION CO LTD
- Filing Date
- 2026-06-03
- Publication Date
- 2026-07-24
AI Technical Summary
In existing tower boiler water-cooled wall suspension devices, there are problems such as uneven load transfer, poor adaptability to thermal expansion, concentrated temperature stress, and difficulty in installation and adjustment.
Multiple vertically arranged pre-welded components and tension plate assemblies are used. A vertical gap is formed by a first tension plate and a second tension plate arranged in parallel and at intervals. The vertical plates of the pre-welded components extend into the gap and are connected to the pressure block through intermittent weld points to form a clamping structure. Combined with a sliding structure and a hanging rod suspension structure, the load is uniformly transferred and the thermal expansion is coordinated.
It achieves reliable load transfer and effective coordination of thermal expansion, reduces temperature stress, improves the safety and reliability of boiler operation, and simplifies the installation process.
Smart Images
Figure CN122447718A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of boiler water-cooled wall technology, specifically to a suspension device and water-cooled wall structure for tower boiler water-cooled walls. Background Technology
[0002] Spiral tube coil water-cooled walls are widely used in tower boilers due to their advantages such as effectively eliminating thermal deviation and adapting to various fuels. However, the tube axis of the spiral coil is nearly horizontal, and the stress generated by the weight of the coil and working fluid, ash accumulation, and furnace negative pressure is basically in the same direction as the radial stress generated by the internal pressure, resulting in a combined stress much greater than that of a vertical tube coil water-cooled wall. Therefore, vertically arranged force-transmitting components (usually called slings or tension plates) are needed to bear part of the load of the spiral coil and transfer it to the vertical tube coil or furnace top steel frame in the upper part of the furnace. In the prior art, for example, Chinese utility model patent CN201344517Y discloses a spiral water-cooled wall force-transmitting sling device, which includes a sling plate, a plug at the bottom of the sling plate where it contacts the spiral tube section, the plug engaging with the spiral tube section, and a large blade plate on the top end face of the sling plate that transfers the load to the vertical tube section. This solution replaces welding with plug engagement, avoiding the risk of cracking in the spiral section of the pipe. At the same time, the large blade plate is set on the top end face of the sling plate, providing a certain margin for adjustment of left and right deviations.
[0003] However, the aforementioned existing technologies still have shortcomings. First, the "meshing" structure between the plug and the spiral tube section is difficult to guarantee uniform contact during actual manufacturing and installation. Furthermore, the spiral tube surface is circular, and relying solely on meshing cannot form a reliable force transmission surface. After long-term operation, loosening or wear may occur, leading to uneven load transmission. Second, the suspension plate is a single-plate structure, and its connection point with the spiral tube relies solely on localized meshing with the plug, making it difficult to accommodate the complex thermal expansion deformation of the spiral tube coil during boiler start-up and shutdown. Third, the connection method between the large blade plate and the vertical tube section lacks thermal expansion compensation design. When there is a temperature difference between the vertical tube section and the spiral tube section, additional temperature stress is easily generated. Therefore, a suspension device and water-cooled wall structure for tower boiler water-cooled walls are proposed. Summary of the Invention
[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a suspension device and water-cooled wall structure for tower boiler water-cooled walls. It has advantages such as reliable load transfer, strong adaptability to thermal expansion, low temperature stress, and convenient installation and maintenance. It solves the problems of unreliable force transmission, lack of thermal expansion compensation leading to temperature stress concentration, and difficulty in installation and adjustment of existing single-plate sling structures.
[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: This invention provides a suspension device for a water-cooled wall of a tower boiler, the water-cooled wall comprising a lower spiral tube coil and an upper vertical tube coil, the suspension device comprising: Multiple vertically arranged pre-welded components are fixedly connected to the outer wall of the spiral tube of the spiral tube coil screen; At least one set of tension plate assemblies is vertically arranged along the height direction of the boiler. The tension plate assembly has a first side and a second side. The first side is connected to the pre-welded part, and the second side is connected to the vertical tube ring screen and the furnace top steel frame. The tension plate assembly includes a first tension plate and a second tension plate arranged in parallel and spaced apart, with a vertical gap formed between the first tension plate and the second tension plate, and a portion of the pre-welded component extending into the vertical gap.
[0006] The pre-welded components include: An arc-shaped base plate, the curvature of which matches the curvature of the outer wall of the spiral tube, is welded to the outer wall of the spiral tube; A vertical support plate extends upward from the upper surface of the arc-shaped base plate, and the thickness of the vertical support plate is less than the width of the arc-shaped base plate; The vertical plate extends into the vertical gap between the first tension plate and the second tension plate.
[0007] The two sides of the vertical plate are connected to the inner surfaces of the first tension plate and the second tension plate respectively through intermittent weld points.
[0008] The suspension device also includes multiple pressure blocks; Each of the pre-welded components is provided with two pressure blocks, one of which is welded to the outer wall of the spiral tube and presses against the outer surface of the first tension plate, and the other is welded to the outer wall of the spiral tube and presses against the outer surface of the second tension plate. The first tension plate and the second tension plate are clamped between the vertical plate of the pre-welded component and the pressure block on the corresponding side.
[0009] The second side of the tension plate assembly is connected to the vertical tube coil screen via a sliding structure. The sliding structure includes: two C-shaped clamps, which are respectively welded to two different vertical tube coil screens; and two T-shaped slide rails, which are respectively fixed to the first tension plate and the second tension plate. The T-shaped slide rail slides vertically into the groove of the corresponding C-shaped clamp.
[0010] The second side of the tension plate assembly is connected to the furnace top steel frame via a suspension structure. The suspension structure includes: a top lug fixedly connected to the lower surface of the furnace top steel frame, at least one vertical rigid rod, and a bottom lug fixedly connected to the top of the first tension plate and the second tension plate; The upper end of the rigid rod is hinged to the top lug via an upper pin, and the lower end of the rigid rod is hinged to the bottom lug via a lower pin.
[0011] The pre-welded component is made of a thermally conductive metal material. The arc-shaped base plate is welded to the outer wall of the spiral tube, and the vertical plate is in contact with the tension plate assembly, so that the pre-welded component forms a continuous heat conduction path from the spiral tube to the tension plate assembly, which is used to conduct the heat of the spiral tube to the tension plate assembly to reduce the temperature stress between the two.
[0012] The pressure block has an arc-shaped inner surface that matches the curvature of the outer wall of the spiral tube, and the arc-shaped inner surface is welded to the outer wall of the spiral tube.
[0013] The top and bottom of the T-shaped slide rail are respectively provided with a first lateral limiting block and a second lateral limiting block. The width of the first lateral limiting block and the second lateral limiting block are both greater than the width of the groove opening of the C-shaped clamp, so as to prevent the T-shaped slide rail from coming out of the top or bottom of the groove.
[0014] Another aspect of the present invention provides a water-cooled wall structure for a tower boiler, comprising: Lower spiral tube coil screen and upper vertical tube coil screen; And the aforementioned suspension device for water-cooled walls of tower boilers; The pre-welded parts in the suspension device are welded to the spiral tube of the spiral tube ring screen, and the second side of the tension plate assembly in the suspension device is fixedly connected to the vertical tube ring screen and the furnace top steel frame.
[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a suspension device and water-cooled wall structure for a tower boiler water-cooled wall, which has the following beneficial effects: This invention utilizes a vertical clamp formed by parallel and spaced-apart first and second tension plates. The vertical plate of the pre-welded component extends into the clamp and, together with the pressure blocks on both sides, forms a clamping structure. This avoids extensive welding of the spiral tube and solves the problem of easy tube cracking in existing technologies. Simultaneously, the pre-welded component is connected to the tension plates using intermittent weld points. Compared to continuous welding, this reduces the heat-affected zone and welding deformation, lowers welding stress, prevents weld cracking, and improves the fatigue resistance of the device. Furthermore, the combination of a sliding structure and a suspension structure achieves adaptive thermal expansion and uniform load distribution. Therefore, this invention achieves a unified system of reliable load transfer and coordinated thermal expansion of the spiral tube coil, significantly improving the safety and reliability of boiler operation. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 3 This is a schematic diagram of the structure of the spiral tube coil screen, pre-welded parts, and pressure iron block in this invention; Figure 4 This is a schematic diagram of the welding structure between the vertical plate and the tension plate in this invention.
[0017] In the diagram: 1. Spiral tube coil screen; 2. Vertical tube coil screen; 3. Pre-welded component; 301. Arc-shaped bottom plate; 302. Vertical plate; 4. Tension plate assembly; 401. First tension plate; 402. Second tension plate; 403. Vertical gap; 5. Furnace top steel frame; 6. Iron pressing block; 7. C-shaped clamp; 8. T-shaped slide rail; 9. Top lifting lug; 10. Rigid lifting rod; 11. Bottom lifting lug; 12. First lateral limiting block; 13. Second lateral limiting block. Detailed Implementation
[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0019] Example 1 Please see Figure 1-4 This invention provides a suspension device for a water-cooled wall of a tower boiler. The water-cooled wall includes a lower spiral tube coil screen 1 and an upper vertical tube coil screen 2. The suspension device includes: multiple pre-welded parts 3, fixedly connected to the outer wall of the spiral tube of the spiral tube coil screen 1; at least one tension plate assembly 4, vertically arranged along the boiler height direction. The tension plate assembly 4 has a first side and a second side. The first side is connected to the pre-welded parts 3, and the second side is connected to the vertical tube coil screen 2 and the furnace top steel frame 5. The tension plate assembly 4 includes a first tension plate 401 and a second tension plate 402 arranged in parallel and at intervals. A vertical gap 403 is formed between the first tension plate 401 and the second tension plate 402, and a portion of the pre-welded parts 3 extends into the vertical gap 403. It should be noted that the spiral tube coil and the vertical tube coil are transitioned through an intermediate mixing header. The number of tension plate assemblies 4 is determined by the specific dimensions of the boiler water-cooled wall and the dimensions of the tension plates.
[0020] In this embodiment, the pre-welded component 3 includes: an arc-shaped base plate 301, the arc of which is consistent with the arc of the outer wall of the spiral tube, and welded to the outer wall of the spiral tube; a vertical plate 302, extending upward from the upper surface of the arc-shaped base plate 301, the thickness of the vertical plate 302 being less than the width of the arc-shaped base plate 301; and the vertical plate 302 extending into the vertical gap 403 between the first tension plate 401 and the second tension plate 402.
[0021] It should be noted that the curvature of the arc-shaped base plate 301 is consistent with the curvature of the outer wall of the spiral tube, enabling close welding, ensuring uniform force transmission, and avoiding stress concentration at point contact. The thickness of the vertical plate 302 is typically 1 / 2 to 2 / 3 of the width of the arc-shaped base plate 301. For example, when the width of the arc-shaped base plate 301 is 40mm, the thickness of the vertical plate 302 is 20mm-28mm to ensure that the vertical plate 302 can be smoothly inserted into the vertical gap 403 and leave a certain gap for thermal expansion. The pre-welded part 3 is forged from heat-resistant alloy steel (such as 15CrMoG or 12Cr1MoVG), possessing good high-temperature strength and thermal conductivity.
[0022] In this embodiment, the two side surfaces of the vertical plate 302 are connected to the inner side surfaces of the first tension plate 401 and the second tension plate 402 respectively through intermittent weld points.
[0023] It should be noted that the so-called "intermittent weld connection" refers to welding a 20mm-30mm long weld point at regular intervals (e.g., 100mm-200mm) along the length of the vertical plate 302, rather than continuous welding along the entire length. This connection method has the following advantages: First, it can fix the pre-welded part 3 and the tension plate assembly 4 together, transferring the gravity load of the spiral tube coil; second, it forms a heat conduction path, allowing the heat of the spiral tube to be conducted to the tension plate assembly 4 through the pre-welded part 3, reducing the temperature difference and temperature stress between the two; third, it avoids the large heat-affected zone and welding deformation caused by continuous welding, reduces welding residual stress, and effectively prevents the weld from cracking under long-term high-temperature alternating loads. In this embodiment, the length, spacing, and number of intermittent weld points can be determined based on stress analysis and fatigue calculations.
[0024] In this embodiment, the suspension device further includes a plurality of pressure blocks 6; each pre-welded component 3 is provided with two pressure blocks 6. In this embodiment, one pressure block 6 is welded to the outer wall of the spiral tube and presses against the outer surface of the first tension plate 401, and the other pressure block 6 is welded to the outer wall of the spiral tube and presses against the outer surface of the second tension plate 402; the first tension plate 401 and the second tension plate 402 are clamped between the vertical plate 302 of the pre-welded component 3 and the corresponding pressure block 6.
[0025] It should be noted that the function of the pressure block 6 is to press the tension plate assembly 4 firmly onto the vertical plate 302 of the pre-welded part 3, preventing the tension plate assembly 4 from coming out of the vertical gap 403, while allowing the tension plate assembly 4 to slide slightly in the vertical direction within the gap to absorb differences in thermal expansion. Each pre-welded part 3 corresponds to two pressure blocks 6 of the same height, located outside the first tension plate 401 and the second tension plate 402 respectively, forming a "sandwich" structure with the middle vertical plate 302. The pressure block 6 is welded to the outer wall of the spiral tube, and its welding position should ensure a gap of 0.5mm-1mm between the inner surface of the pressure block 6 and the outer surface of the tension plate assembly 4, ensuring tightness without excessive jamming. The number of pressure blocks 6 can be set according to the height of the tension plate assembly 4 and the load size, and they are arranged at intervals along the height direction.
[0026] In this embodiment, the second side of the tension plate assembly 4 is connected to the vertical tube coil screen 2 via a sliding structure; the sliding structure includes: two C-shaped clamps 7, which are respectively welded to two different vertical tube coil screens 2; and two T-shaped slide rails 8, which are respectively fixed to the first tension plate 401 and the second tension plate 402; the T-shaped slide rails 8 slide vertically into the grooves of the corresponding C-shaped clamps 7.
[0027] It should be noted that the "two different vertical tube coil screens 2" refer to the two vertical tube screens corresponding to the front and rear positions of the tension plate assembly 4, with each C-shaped clamp 7 welded to the tube wall of one vertical tube screen. The C-shaped clamp 7 is made of heat-resistant steel plate by bending or machining, and the cross-sectional shape of its groove matches that of the T-shaped slide rail 8. The T-shaped slide rail 8 slides vertically into the groove of the C-shaped clamp 7, with a thermal expansion gap between them in the height direction. This sliding structure allows the tension plate assembly 4 to undergo vertical thermal displacement relative to the vertical tube coil screen 2, while restricting horizontal movement, thus achieving load transfer and thermal expansion coordination.
[0028] In this embodiment, the second side of the tension plate assembly 4 is connected to the furnace top steel frame 5 via a suspension structure. The suspension structure includes: a top lug 9 fixedly connected to the lower surface of the furnace top steel frame 5, at least one vertical rigid rod 10, and a bottom lug 11 fixedly connected to the top of the first tension plate 401 and the second tension plate 402. The upper end of the rigid rod 10 is hinged to the top lug 9 via an upper pin, and the lower end of the rigid rod 10 is hinged to the bottom lug 11 via a lower pin.
[0029] It should be noted that the suspension structure of the rigid rod is used to transfer the weight of the tension plate assembly 4 and the spiral tube coil it carries to the furnace top steel frame 5. There are usually two rigid rods 10, corresponding to the first tension plate 401 and the second tension plate 402 respectively. Alternatively, a single rigid rod 10 can be used to connect both bottom lifting lugs 11. Both the upper and lower pins are hinged, allowing the rigid rod 10 to swing at a small angle in the vertical plane to absorb installation deviations and thermal deformation. A length adjuster (such as a threaded sleeve) can also be installed in the middle section of the rigid rod 10 to adjust the suspension height of the rigid rod 10, ensuring uniform load distribution at each lifting point. In this embodiment, the rigid rod 10 is made of the same heat-resistant alloy steel material as the tension plate assembly 4.
[0030] In this embodiment, the pre-welded part 3 is made of thermally conductive metal material, the arc-shaped base plate 301 is welded to the outer wall of the spiral tube, and the vertical plate 302 is in contact with the tension plate assembly 4, so that the pre-welded part 3 forms a continuous heat conduction path from the spiral tube to the tension plate assembly 4, which is used to conduct the heat of the spiral tube to the tension plate assembly 4 to reduce the temperature stress between the two.
[0031] It should be noted that during boiler startup and shutdown, the temperature of the working fluid inside the spiral tube changes rapidly, and the spiral tube wall temperature changes accordingly. If the temperature change of the tension plate assembly 4 lags behind, a large temperature difference will occur between the two, resulting in temperature stress, which may lead to fatigue cracking of the weld in severe cases. In this embodiment, the pre-welded component 3 is made of heat-resistant alloy steel with high thermal conductivity (such as 12Cr1MoVG, with a thermal conductivity of approximately 40 W / (m·K)). Furthermore, the arc-shaped base plate 301 is fully welded to the outer wall of the spiral tube, and the vertical plate 302 is in contact with the tension plate assembly 4 through intermittent weld points, forming a continuous heat conduction path with low thermal resistance. This allows the temperature of the tension plate assembly 4 to quickly follow the temperature change of the spiral tube, effectively reducing the temperature difference and lowering the temperature stress, which is beneficial for the rapid startup and shutdown of the boiler.
[0032] In this embodiment, the pressure block 6 has an arc-shaped inner surface that matches the curvature of the outer wall of the spiral tube, and the arc-shaped inner surface is welded to the outer wall of the spiral tube.
[0033] It should be noted that the close welding of the arc-shaped inner surface to the outer wall of the spiral tube increases the welding contact area, improves the welding strength, and prevents the pressure block 6 from loosening or falling off due to vibration during use. At the same time, the close welding also plays an auxiliary role in heat conduction, further improving thermal conductivity.
[0034] In this embodiment, the top and bottom of the T-shaped slide rail 8 are respectively provided with a first lateral limiting block 12 and a second lateral limiting block 13. The width of the first lateral limiting block 12 and the second lateral limiting block 13 is greater than the width of the groove opening of the C-shaped clamp 7, which is used to prevent the T-shaped slide rail 8 from coming out of the top or bottom of the groove.
[0035] It should be noted that the first lateral limiting block 12 is located at the top of the T-shaped slide rail 8, and the second lateral limiting block 13 is located at the bottom of the T-shaped slide rail 8. Under normal installation and operation conditions, the T-shaped slide rail 8 is within the effective stroke of the C-shaped clamp 7's slide groove. When the boiler experiences significant vibration or unexpected operating conditions, without the limiting blocks, the T-shaped slide rail 8 may jut upwards out of the top of the slide groove or slide downwards out of the bottom of the slide groove, causing the suspension device to fail. The width of the first lateral limiting block 12 is greater than the width of the slide groove opening. Therefore, when the T-shaped slide rail 8 moves upwards to its limit position, the first lateral limiting block 12 will be locked on the top end face of the C-shaped clamp 7, preventing further upward movement. Similarly, the second lateral limiting block 13 prevents downward disengagement. This bidirectional limiting design significantly improves the safety of the device.
[0036] In addition, in this embodiment, the distance between the first tension plate 401 and the second tension plate 402 of the tension plate assembly 4 (i.e. the width of the vertical gap 403) should be slightly greater than the thickness of the vertical plate 302 of the pre-welded part 3, with a difference of 1mm-3mm, so as to facilitate installation and allow a small amount of lateral movement.
[0037] Furthermore, it should be emphasized that during installation, the pre-welded component 3 should first be welded onto the spiral tube according to the designed position. Then, the tension plate assembly 4 should be hoisted to the predetermined height, aligning the T-shaped slide rail 8 with the groove of the C-shaped clamp 7 and sliding it in. Next, the suspension structure should be connected, with the bottom of the tension plate assembly 4 corresponding to the position of the pre-welded component 3. The pre-welded component 3 and the tension plate assembly 4 should be connected with intermittent weld points. Then, for each intermittent weld point, connect one pre-welded component 3, and weld two pressure blocks 6 onto the outer wall of the spiral tube at the same height as the pre-welded component 3, respectively pressing against the outer surfaces of the first tension plate 401 and the second tension plate 402. The entire installation process eliminates the need for complex continuous welding operations at high altitudes, greatly reducing construction difficulty.
[0038] Example 2 Another aspect of the present invention provides a tower boiler water-cooled wall structure, including: a lower spiral tube coil screen 1 and an upper vertical tube coil screen 2; and the suspension device for the tower boiler water-cooled wall in the above embodiment 1; the pre-welded part 3 in the suspension device is welded to the spiral tube of the spiral tube coil screen 1, and the second side of the tension plate assembly 4 in the suspension device is fixedly connected to the vertical tube coil screen 2 and the furnace top steel frame 5.
[0039] It should be noted that in the tower boiler water-cooled wall structure, the vertical tube coil screen 2 itself acts as a support to bear the furnace load, while the load of the spiral tube coil screen 1 is transferred to the vertical tube coil screen 2 and the furnace top steel frame 5 through a suspension device. Through this structure, the load of the entire water-cooled wall is evenly distributed, avoiding localized stress concentration and facilitating rapid boiler start-up and shutdown as well as long-term safe operation.
[0040] The suspension device of this invention uses double tension plates to form a vertical clamping slit 403. The vertical plate 302 of the pre-welded component 3 extends into the clamping slit, and together with the pressure blocks 6 on both sides, forms a clamping structure. This structure is connected by intermittent weld points, achieving reliable load transfer and effective coordination of thermal expansion. Integrating this device into the water-cooled wall of a tower boiler avoids the risk of cracking caused by extensive welding of spiral tubes, reduces the heat-affected zone and residual stress, adapts to thermal expansion deformation during boiler start-up and shutdown, and significantly improves operational safety and reliability.
[0041] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.
Claims
1. A suspension device for a water-cooled wall of a tower boiler, the water-cooled wall comprising a lower spiral tube coil screen and an upper vertical tube coil screen, characterized in that, The suspension device includes: Multiple pre-welded components are fixedly connected to the outer wall of the spiral tube of the spiral tube coil screen; At least one set of tension plate assemblies is vertically arranged along the height direction of the boiler. The tension plate assembly has a first side and a second side. The first side is connected to the pre-welded part, and the second side is connected to the vertical tube ring screen and the furnace top steel frame. The tension plate assembly includes a first tension plate and a second tension plate arranged in parallel and spaced apart, with a vertical gap formed between the first tension plate and the second tension plate, and a portion of the pre-welded component extending into the vertical gap.
2. The suspension device for the water-cooled wall of a tower boiler according to claim 1, characterized in that, The pre-welded component includes: An arc-shaped base plate, the curvature of which matches the curvature of the outer wall of the spiral tube, is welded to the outer wall of the spiral tube; A vertical support plate extends upward from the upper surface of the arc-shaped base plate, and the thickness of the vertical support plate is less than the width of the arc-shaped base plate; The vertical plate extends into the vertical gap between the first tension plate and the second tension plate.
3. The suspension device for the water-cooled wall of a tower boiler according to claim 2, characterized in that, The two sides of the vertical plate are connected to the inner surfaces of the first tension plate and the second tension plate respectively through intermittent weld points.
4. The suspension device for the water-cooled wall of a tower boiler according to claim 2, characterized in that, The suspension device also includes multiple pressure blocks; Each of the pre-welded components is provided with two pressure blocks, one of which is welded to the outer wall of the spiral tube and presses against the outer surface of the first tension plate, and the other is welded to the outer wall of the spiral tube and presses against the outer surface of the second tension plate. The first tension plate and the second tension plate are clamped between the vertical plate of the pre-welded component and the pressure block on the corresponding side.
5. The suspension device for the water-cooled wall of a tower boiler according to claim 1, characterized in that, The second side of the tension plate assembly is connected to the vertical tube coil screen via a sliding structure. The sliding structure includes: two C-shaped clamps, which are respectively welded to two different vertical tube coil screens; and two T-shaped slide rails, which are respectively fixed to the first tension plate and the second tension plate. The T-shaped slide rail slides vertically into the groove of the corresponding C-shaped clamp.
6. The suspension device for the water-cooled wall of a tower boiler according to claim 1, characterized in that, The second side of the tension plate assembly is connected to the furnace top steel frame via a suspension structure. The suspension structure includes: a top lug fixedly connected to the lower surface of the furnace top steel frame, at least one vertical rigid rod, and a bottom lug fixedly connected to the top of the first tension plate and the second tension plate; The upper end of the rigid rod is hinged to the top lug via an upper pin, and the lower end of the rigid rod is hinged to the bottom lug via a lower pin.
7. The suspension device for the water-cooled wall of a tower boiler according to claim 2, characterized in that, The pre-welded component is made of a thermally conductive metal material. The arc-shaped base plate is welded to the outer wall of the spiral tube, and the vertical plate is in contact with the tension plate assembly, so that the pre-welded component forms a continuous heat conduction path from the spiral tube to the tension plate assembly, which is used to conduct the heat of the spiral tube to the tension plate assembly to reduce the temperature stress between the two.
8. The suspension device for the water-cooled wall of a tower boiler according to claim 4, characterized in that, The pressure block has an arc-shaped inner surface that matches the curvature of the outer wall of the spiral tube, and the arc-shaped inner surface is welded to the outer wall of the spiral tube.
9. The suspension device for the water-cooled wall of a tower boiler according to claim 5, characterized in that, The top and bottom of the T-shaped slide rail are respectively provided with a first lateral limiting block and a second lateral limiting block. The width of the first lateral limiting block and the second lateral limiting block are both greater than the width of the groove opening of the C-shaped clamp, which is used to prevent the T-shaped slide rail from coming out of the top or bottom of the groove.
10. A water-cooled wall structure for a tower boiler, characterized in that, include: Lower spiral tube coil screen and upper vertical tube coil screen; And a suspension device for a water-cooled wall of a tower boiler as described in any one of claims 1 to 9; The pre-welded parts in the suspension device are welded to the spiral tube of the spiral tube ring screen, and the second side of the tension plate assembly in the suspension device is fixedly connected to the vertical tube ring screen and the furnace top steel frame.